猝死是在很短时间内患者发生意料不到的、非创伤性或中毒所致的突然死亡,是貌似健康或病情已稳定的情况下[1]随时随地发生。大多数猝死者发生在院外,且多在症状发生后2 h内死亡[2]。目前大多数学者倾向于将猝死的时间限定在发病1h内[3],世界卫生组织定为发病后6 h内死亡者为猝死[4-5]。因此,重视猝死的院前急救,提高院外急救水平,具有重要的社 Sudden death is a sudden death caused by an unexpected, non-invasive or poisoned patient in a very short period of time that appears to be healthy or has stabilized conditions [1] anytime, anywhere. Most sudden death occurred outside the hospital, and many died within 2 h after the onset of symptoms [2]. At present, most scholars tend to limit the time of sudden death to within 1 hour of onset [3], and the World Health Organization set the death as sudden death within 6 hours after onset [4-5]. Therefore, attention to sudden death in pre-hospital care and improve the level of first aid outside the hospital, with an important community